Manual artificial respiration bag comprising a venturi device

Abstract

The invention concerns a manual artificial respiration bag ( 1 ) for ventilating a patient in need thereof, comprising a deformable bag ( 10 ) with a gas inlet ( 11 ), a gas outlet ( 12 ) and an inner volume ( 13 ) for a respiratory gas; an upstream conduct element ( 20 ) fluidly connected to the gas inlet ( 11 ) of the deformable bag ( 10 ), and comprising a gas entry port ( 21 ); and a downstream conduct element ( 30 ) fluidly connected to the gas outlet ( 12 ) of the deformable bag ( 10 ), comprising an exhaust valve ( 35 ) comprising an exhaust port ( 36 ). A venturi device ( 50 ) comprising a main body ( 110 ) comprising a venturi nozzle ( 120 ); at least one oxygen inlet ( 131 ) for providing oxygen; at least one air inlet ( 132 ) for providing air; a mixing chamber ( 133 ) for mixing therein oxygen and air and obtaining an air/oxygen mixture; and gas selection means ( 110, 130 ) for selecting oxygen or an air/oxygen mixture as a desired gas to be provided to the venturi nozzle ( 120 ). The venturi nozzle ( 120 ) is in fluid communication with the upstream conduct element ( 20 ), via the gas entry port ( 21 ), for providing the desired gas to the upstream conduct element ( 20 ), such as oxygen or an air/oxygen mixture.

What is claimed is: 
     
         1 . A manual artificial respiration bag ( 1 ) comprising:
 a deformable bag ( 10 ) comprising a gas inlet ( 11 ), a gas outlet ( 12 ) and an inner volume ( 13 ) for a respiratory gas,   an upstream conduct element ( 20 ) fluidly connected to the gas inlet ( 11 ) of the deformable bag ( 10 ), and comprising a gas entry port ( 21 ), and   a downstream conduct element ( 30 ) fluidly connected to the gas outlet ( 12 ) of the deformable bag ( 10 ), comprising an exhaust valve ( 35 ) comprising an exhaust port ( 36 ),   a venturi device ( 50 ) comprising:
 a main body ( 110 ) comprising a venturi nozzle ( 120 ), 
 at least one oxygen inlet ( 131 ) for providing oxygen, 
 at least one air inlet ( 132 ) for providing air, and 
 a mixing chamber ( 133 ) for mixing therein oxygen provided by said oxygen inlet ( 131 ) and air provided by said at least one air inlet ( 132 ), thereby obtaining an air/oxygen mixture, 
   
       and wherein the venturi nozzle ( 120 ) is in fluid communication with the upstream conduct element ( 20 ), via the gas entry port ( 21 ) arranged in said upstream conduct element ( 20 ), for providing the desired gas to the upstream conduct element ( 20 ),
 characterized in that:
 the venturi device ( 50 ) further comprises a gas selection switch ( 110 ,  130 ) for selecting oxygen provided by said at least one oxygen inlet ( 131 ) or an air/oxygen mixture provided by said mixing chamber ( 133 ) as a desired gas to be provided to the venturi nozzle ( 120 ), 
 wherein the gas selection switch ( 110 ,  130 ) of the venturi device ( 50 ) comprises a rear member ( 130 ) comprising said at least one oxygen inlet ( 131 ), said at least one air inlet ( 132 ), and said mixing chamber ( 133 ), said rear member ( 130 ) being mobile with respect to the main body ( 110 ) between at least:
 a closed position wherein the rear member ( 130 ) provides oxygen as the desired gas to the venturi nozzle ( 120 ), and 
 an open position wherein the rear member ( 130 ) provides an air/oxygen mixture as the desired gas to the venturi nozzle ( 120 ), and 
 
 wherein the rear member ( 130 ) of the gas selection switch ( 110 ,  130 ) is mobile according to a helicoidal motion with respect to the main body ( 110 ) of the venturi device ( 50 ) for allowing a user to manually select the desired open or the closed position. 
 
 
     
     
         2 . The manual artificial respiration bag according to  claim 1 , characterized in that the main body ( 110 ) of the venturi device ( 50 ) comprises an inner compartment ( 111 ) containing the venturi nozzle ( 120 ). 
     
     
         3 . The manual artificial respiration bag according to  claim 1 , characterized in that the main body ( 110 ) of the venturi device ( 50 ) comprises at least one elongated groove ( 140 ) and the rear member ( 130 ) comprises at least one guiding member ( 150 ), or vice versa, said at least one guiding member ( 150 ) being inserted into said at least one elongated groove ( 140 ) so as to cooperate with said at least one elongated groove ( 140 ) for guiding the helicoidal motion of the rear member ( 130 ) with respect to the main body ( 110 ), while actuated by a user. 
     
     
         4 . The manual artificial respiration bag according to  claim 3 , characterized in that the rear member ( 130 ) comprises an oxygen feeding conduct ( 135 ). 
     
     
         5 . The manual artificial respiration bag according to  claim 4 , characterized in that the oxygen feeding conduct ( 135 ) is axially-arranged in the rear member ( 130 ). 
     
     
         6 . The manual artificial respiration bag according to  claim 4 , characterized in that, in the closed position, a proximal free end of an inner conduct portion ( 135 - 1 ) of the oxygen feeding conduct ( 135 ) of the rear member ( 130 ) is inserted into a first portion ( 120 - 1 ) of an inner nozzle channel ( 120 - 1 ,  120 - 2 ) of the venturi nozzle ( 120 ) so as to deliver oxygen directly into the venturi nozzle ( 120 ). 
     
     
         7 . The manual artificial respiration bag according to  claim 6 , characterized in that, in the open position, the proximal free end of the inner conduct portion ( 135 - 1 ) of the oxygen feeding conduct ( 135 ) of the rear member ( 130 ) is positioned into the mixing chamber ( 133 ) for providing a flow of oxygen to the mixing chamber ( 133 ) so as to generate an air/oxygen mixture into said mixing chamber ( 133 ). 
     
     
         8 . The manual artificial respiration bag according to  claim 3 , characterized in that each elongated groove ( 140 ) of the main body ( 110 ) comprises a curved linear portion ( 147 ) terminated by two end lodgings ( 146 A,  146 B), each end lodging ( 146 A,  146 B) comprises an abutment ( 145 ), the end lodgings ( 146 A,  146 B) and the abutments ( 145 ) cooperating with the protrusions ( 151 ) of the rear member ( 130 ) for setting the venturi device ( 50 ) in the open ( 146 B) or in the closed ( 146 A) positions. 
     
     
         9 . The manual artificial respiration bag according to  claim 8 , characterized in that the open ( 146 B) and the closed ( 146 A) positions are stable positions. 
     
     
         10 . The manual artificial respiration bag according to  claim 1 , further comprising an upstream one-way valve arranged into the upstream conduct element ( 20 ). 
     
     
         11 . The manual artificial respiration bag according to  claim 1 , characterized in that the upstream conduct element ( 20 ) further comprises a PEP exhaust valve ( 22 ) fluidly communicating with the ambient atmosphere for venting gas to the atmosphere when the gas pressure, into the upstream conduct element ( 20 ), exceeds a given pressure threshold, 
     
     
         12 . The manual artificial respiration bag according to  claim 11 , characterized in that the PEP exhaust valve ( 22 ) comprises a PEP-setting selection for setting the desired pressure threshold. 
     
     
         13 . The manual artificial respiration bag according to  claim 1 , characterized in that:
 the upstream conduct element ( 20 ) further comprises a reservoir port ( 20 - 1 ) for fluidly connecting a flexible gas reservoir ( 40 ) thereto, and/or   the downstream conduct element ( 30 ) further comprises an interface port ( 32 ) for fluidly connecting a respiratory interface thereto.   
     
     
         14 . The manual artificial respiration bag according to  claim 1 , further comprising an upstream one-way valve arranged into the upstream conduct element ( 20 ) configured for allowing a flow of respiratory gas to pass through said upstream one-way valve only toward the deformable bag ( 10 ). 
     
     
         15 . The manual artificial respiration bag according  claim 13 , further comprising:
 a flexible gas reservoir ( 40 ) fluidly connected to the reservoir port ( 20 - 1 ) of the upstream conduct element ( 20 ), and/or   a respiratory interface fluidly connected the interface port ( 32 ) of the downstream conduct element ( 30 ), and/or   an oxygen source fluidly connected to the venturi device ( 50 ).